An obvious question is: how general is this universality? We motivated it by
pointing out that the examples considered in the present paper define consistent \(S\) -matrices
for any \(n \rightarrow m\)  scattering, whereas the bounds were derived by considering
\(2 \rightarrow 2\)  scattering only.
To answer this question we would need to better understand the landscape of
consistent gravitational amplitudes, including any unitary
perturbative or nonperturbative QFT coupled to gravity, as well as
amplitudes in theories with extra dimensions. In particular,
it would be very interesting to understand if and how consistency of \(n \rightarrow m\) 
scattering can be used to rigorously establish stronger bounds on \(2 \rightarrow 2\)  scattering, potentially bringing us closer to the small theory
islands observed in the present work. It would also be very interesting to understand the
example of large-\(N\)  QCD coupled to gravity [1]}.
